Keep up the good work! Sometimes people might substitute one addiction/habit for another. Have you been eating more than normal? One of the more serious side effects of this medication is weight loss, not gain. Try to keep a daily journal of the foods you eat and when. Maybe try to exercise a bit more too. I know when I tried to quit smoking, I gained at least 15lbs in 10 weeks!. So don't be discouraged! You are off to a good start, keep your eye on the prize my friend!!